Temperature-actuated valve assembly

a technology of valve assembly and temperature-actuated valve, which is applied in the direction of valve operating means/release devices, process and machine control, instruments, etc., can solve the problems that the control valve cannot be tested to ensure proper operation, and the over-temperature shutoff valve may still require manual intervention to be res

Inactive Publication Date: 2010-12-07
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The assembly automatically closes and re-opens based on temperature changes, ensuring reliable operation and reducing maintenance needs, while preventing contamination and ensuring proper function without manual intervention.

Problems solved by technology

In addition, such control valves cannot be tested to ensure proper operation without heating and melting the eutectic plug.
Although over-temperature shutoff valves have been developed that employ non-perishable temperature-sensitive elements (e.g., shape memory alloy actuators), such over-temperature shutoff valves may still require manual intervention to be reset.

Method used

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  • Temperature-actuated valve assembly
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Embodiment Construction

[0010]The following detailed description of the invention is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description of the invention.

[0011]FIGS. 1 and 2 are cross-sectional views of a temperature-actuated valve assembly 10 in open and closed states, respectively, in accordance with a first exemplary embodiment. Temperature-actuated valve assembly 10 may be utilized as, for example, an over-temperature shutoff valve in an aircraft bleed air system or as an oil vent valve associated with an aircraft turbine engine. Temperature-actuated valve assembly 10 comprises a valve assembly housing 12, a pneumatically-actuated valve 14, and a thermostatic valve 16. Two flow passages are formed through valve assembly housing 12; i.e., (1) a main flow passage 18, which includes an inlet...

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Abstract

A temperature-actuated valve assembly is provided, which includes a valve assembly housing having a main flow passage and a control flow passage. A pneumatically-actuated valve is fluidly coupled to the control flow passage and configured to control fluid flow through the main flow passage. A first thermostatic valve is in thermal communication with the main flow passage and configured to control fluid flow through the control flow passage to position the pneumatically-actuated valve.

Description

TECHNICAL FIELD[0001]The present invention relates generally to valve assemblies and, more particularly, to a temperature-actuated valve assembly suitable for deployment on an aircraft.BACKGROUND[0002]Temperature-actuated valve assemblies, which open or close at a predetermined temperature, are known in a wide variety of industries. In the avionics field, temperature-actuated valve assemblies are commonly employed as over-temperature shutoff valves in aircraft bleed air systems. Such over-temperature shutoff valves are configured to close, and thus protect temperature-sensitive downstream components, when the fluid conducted by the valve assembly becomes too hot. Over-temperature shutoff valves of this type may employ thermal fuse plugs made of eutectic alloys that abruptly melt at a predetermined actuation temperature. The eutectic fuse plug may maintain a spring-loaded flapper (or other such valve element) in an open position. When the bleed air heats the eutectic fuse plug to its...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): G05D23/02
CPCG05D23/022Y10T137/7737
InventorFRANCONI, ROBERT B.
OwnerHONEYWELL INT INC